Physics, 19.12.2019 03:31 ashleybaber4966
The coefficient of volume expansion of a certain olive oil is 0.68 × 10-3 k-1. a 1.0-l glass beaker is filled to the brim with olive oil at room temperature. the beaker is placed on a range and the temperature of the oil and beaker increases by 25 c°. as a result, 0.0167 l of olive oil spills over the top of the beaker. which of the following values is closest to the coefficient of linear expansion of the glass from which the beaker is made?
a. 4 × 10-6 k^-1
b. 2 × 10-5 k^-1
c. 3 × 10-5 k^-1
d. 1 × 10-5 k^-1
e. 1 × 10-6 k^-1
Answers: 3
Physics, 22.06.2019 00:40
The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.
Answers: 1
Physics, 22.06.2019 02:30
Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.
Answers: 3
Physics, 22.06.2019 10:40
As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
The coefficient of volume expansion of a certain olive oil is 0.68 × 10-3 k-1. a 1.0-l glass beaker...
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